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Nice concept, but for the "walking" part sadly I have to say no. At least with your current foot configuration. To be able to walk you have to move the centre of the gravity between three support points to stabilise the robot (three is the most stabile contact points when you are not using sensors thus no feedback). Since you have pointy feet and only three legs a walking motion is impossible, but like many others have pointed out hopping or dragging are viable options. But if you are to keep this three legged then is you add one joint to each leg and a wider paw and also make it walk with legs nearly straight down you might be able to artificially create the triangle of contact points.
Your stability video really proved that triangle is the best support shape sadly in it every leg counts for the balance. Other thing that came to mind is that your legs are quite far from the centre of the gravity. This even more improves its a balance but makes difficult to shift the weight to the two legs since they are quite far from the optimal position.
Otherwise your approach to the problem of using feather servos as a supporting structure is splendid

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Instructions

For this tripod you will need 9 metal geared servo motors (~12g).
Assemble each leg. Then mount the legs on the center triangle part.
The provided leg parts are optimized for servo gears with a diameter of 4.8 mm. You have to melt the inner surface of printed part using a tiny flame, to mount it on the servo gear. The part should not fit on the servo without melting it. If your servo gear's dimensions are different (>0.05 mm), then create your own version from the ancestor scad files.

You can use the four M3 holes of the triangle to mount the "head" (not included).

Nice concept, but for the "walking" part sadly I have to say no. At least with your current foot configuration. To be able to walk you have to move the centre of the gravity between three support points to stabilise the robot (three is the most stabile contact points when you are not using sensors thus no feedback). Since you have pointy feet and only three legs a walking motion is impossible, but like many others have pointed out hopping or dragging are viable options. But if you are to keep this three legged then is you add one joint to each leg and a wider paw and also make it walk with legs nearly straight down you might be able to artificially create the triangle of contact points.
Your stability video really proved that triangle is the best support shape sadly in it every leg counts for the balance. Other thing that came to mind is that your legs are quite far from the centre of the gravity. This even more improves its a balance but makes difficult to shift the weight to the two legs since they are quite far from the optimal position.
Otherwise your approach to the problem of using feather servos as a supporting structure is splendid

it will have to step quickly. You will probably have more luck going straight if it lunges/hops forward off the single back leg and lands/catches itself on the front two. It's going to have to hop like a frog or rabbit. The other option is to put wide feet on each leg so that standing on two legs will offer more stability like a cane with more than one foot.